The preliminary findings say how the company believes the explosion occurred. A union statement cautioned the investigation ...

The deadly explosion at Clairton Coke Works near Pittsburgh occurred when a gas valve was flushed before planned maintenance, ...

Allegheny County is increasing air quality monitoring after an explosion at a U.S. Steel plant south of Pittsburgh killed two ...

U.S. Steel released preliminary findings about the potential cause of Monday's deadly explosion at U.S. Steel Clairton Coke ...

Halle Berry Has Cheeky Response to Ex David Justice’s Remarks About Her Not Being ‘Motherly’ NCAA imposes 10-year "show cause" order on Jim Harbaugh Real-Time Meltdown: China’s Economy Is Falling ...

U.S. Steel has released new details on what investigators believe caused the explosion at the Clairton Coke Works plant.

U.S. Steel says preparations for a routine maintenance task may have led to an explosion at a U.S. Steel coal-processing ...

"Pressure built inside the valve, leading to valve failure and coke oven gas filling the area and ultimately exploding when ...